style.css

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
}

.chat-container {
    width: 100%;
    max-width: 450px;
    height: 90vh;
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: #ffffff;
}

.chat-header {
    padding: 16px;
    background-color: #00796b;
    color: white;
    text-align: center;
    font-weight: bold;
    font-size: 1.2em;
}

.chat-box {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    background-color: #e5e5e5;
}

.chat-box .user-message, .chat-box .bot-message {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: 12px;
    line-height: 1.4;
    display: flex;
    align-items: center;
    position: relative;
    font-size: 0.9em;
}

.user-message {
    align-self: flex-end;
    background-color: #00796b;
    color: white;
    border-bottom-right-radius: 2px;
    border-bottom-left-radius: 12px;
}

.bot-message {
    align-self: flex-start;
    background-color: #f1f0f0;
    color: #333;
    border-bottom-left-radius: 2px;
    border-bottom-right-radius: 12px;
}

.bot-message span, .user-message span {
    font-size: 0.75em;
    color: #999;
    margin-right: 8px;
}

#typing-indicator {
    font-style: italic;
    color: #777;
    display: none;
}

#chat-form {
    display: flex;
    gap: 5px;
    padding: 10px;
    background-color: #ffffff;
    border-top: 1px solid #ddd;
}

#chat-form input {
    flex: 1;
    padding: 10px;
    font-size: 1em;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s;
}

#chat-form input:focus {
    border-color: #00796b;
}

#chat-form button {
    background-color: #00796b;
    color: white;
    border: none;
    padding: 0 15px;
    font-size: 1em;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

#chat-form button:hover {
    background-color: #005b4f;
}

#chat-form #clear-chat {
    background-color: #ff5f5f;
}

#chat-form #clear-chat:hover {
    background-color: #cc4a4a;
}